While we are on the topic of US cleaners. We have a commercial unit and have been using Ultralube 2000 Safewash cleaner. It seems to leave a residue, is anyone else out there using this ? Do you have this problem ? It seems the Isopropyl Alcohol leaves a better finish. Kind Regards David Huisman (CEO) ----------------------------------------------------------------------- ORBIT COMMUNICATIONS Pty Ltd - Wireless Solutions that Work (Telemetry, Control, Monitoring, Security, HVAC ...) A.C.N. 107 441 869 Website : http://www.orbitcoms.com PO Box 4474 Lakehaven NSW 2259, AUSTRALIA Phone: 61-2-4393-3627 Fax : 61-2-4393-3685 Mobile: 61-413-715-986 -----Original Message----- From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Sergio Masci Sent: Thursday, 8 April 2004 1:56 AM To: PICLIST@MITVMA.MIT.EDU Subject: Re: [OT]: Ultrasonic cleaner ----- Original Message ----- From: Madhu Annapragada To: Sent: Wednesday, April 07, 2004 4:01 PM Subject: Re: [OT]: Ultrasonic cleaner > I just finished designing one at work (none of the COTS met specs..) and the > frequency was 60KHz, at 50W. I had a PLL and FETs doing the switching. It > will be used to clean up DNA from specially coated stainless tips on a > machine. I have seen cleaners go as low as 40KHz. From what I understand, > the finer the particles you need to break up the higher the frequency. The > wattage of course depends on the amount of cleaning fluid in the tank. This > web site (among others) has some good technical links: > http://www.bluewaveinc.com/ > Madhu Don't you have to be carefull about the frequency and power? Isn't there a problem with pitting at the surface of the object to be cleaned? Regards Sergio Masci http://www.xcprod.com/titan/XCSB - optimising structured PIC BASIC compiler -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics